Chapter 9
216
Logic programming – Function blocks
9.10.3 Information on wiring
If muting functions are to be implemented, possible errors in the wiring have to be
taken into consideration. If certain signal combinations are to be transferred in a
common wire, additional precautions have to be taken in order to ensure that the
respective signals are correct. Suitable measures have to be taken (e.g. protected
wiring) in order to ensure that errors cannot arise through this wiring.
Signal
description
A1
A2
B1
B2
C1
Conveyor
ESPE
Override input
Enable output
Muting lamp
Muting status
Override required
A1
– A B B A A A A A A A C
A2
A – B B A A A A A A A C
B1
B B – A A A A A A A A C
B2
B B A – A A A A A A A C
C1
A A A A – A A A A C C C
Conveyor
A A A A A – C A A C C C
ESPE
A A A A A C – C A C C C
Override input
A A A A A A C – A A C A
A The specified signals may not be installed in a common wire unless protected
wiring is used.
B The specified signals may not be installed in a common wire unless protected
wiring or sequence monitoring is used.
C The specified signals may be installed in a common wire.
– Not applicable
Table 99:
Wiring combinations for
muting and prerequisites
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